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<a name="1" href="#1">1</a>   <em class="comment">/*</em>
<a name="2" href="#2">2</a>   <em class="comment"> * @(#)ClassUtilsTypeArgumentsTest.java     6 Mar 2009</em>
<a name="3" href="#3">3</a>   <em class="comment"> * </em>
<a name="4" href="#4">4</a>   <em class="comment"> * Copyright © 2009 Andrew Phillips.</em>
<a name="5" href="#5">5</a>   <em class="comment"> *</em>
<a name="6" href="#6">6</a>   <em class="comment"> * ====================================================================</em>
<a name="7" href="#7">7</a>   <em class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="8" href="#8">8</a>   <em class="comment"> * you may not use this file except in compliance with the License.</em>
<a name="9" href="#9">9</a>   <em class="comment"> * You may obtain a copy of the License at</em>
<a name="10" href="#10">10</a>  <em class="comment"> *</em>
<a name="11" href="#11">11</a>  <em class="comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="12" href="#12">12</a>  <em class="comment"> *</em>
<a name="13" href="#13">13</a>  <em class="comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a name="14" href="#14">14</a>  <em class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="15" href="#15">15</a>  <em class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or </em>
<a name="16" href="#16">16</a>  <em class="comment"> * implied.</em>
<a name="17" href="#17">17</a>  <em class="comment"> * See the License for the specific language governing permissions and</em>
<a name="18" href="#18">18</a>  <em class="comment"> * limitations under the License.</em>
<a name="19" href="#19">19</a>  <em class="comment"> * ====================================================================</em>
<a name="20" href="#20">20</a>  <em class="comment"> */</em>
<a name="21" href="#21">21</a>  <strong>package</strong> com.qrmedia.commons.lang;
<a name="22" href="#22">22</a>  
<a name="23" href="#23">23</a>  <strong>import</strong> <strong>static</strong> org.junit.Assert.assertEquals;
<a name="24" href="#24">24</a>  <strong>import</strong> <strong>static</strong> org.junit.Assert.fail;
<a name="25" href="#25">25</a>  
<a name="26" href="#26">26</a>  <strong>import</strong> java.util.ArrayList;
<a name="27" href="#27">27</a>  <strong>import</strong> java.util.Arrays;
<a name="28" href="#28">28</a>  <strong>import</strong> java.util.Collection;
<a name="29" href="#29">29</a>  <strong>import</strong> java.util.List;
<a name="30" href="#30">30</a>  
<a name="31" href="#31">31</a>  <strong>import</strong> org.junit.Test;
<a name="32" href="#32">32</a>  <strong>import</strong> org.junit.runner.RunWith;
<a name="33" href="#33">33</a>  <strong>import</strong> org.junit.runners.Parameterized;
<a name="34" href="#34">34</a>  <strong>import</strong> org.junit.runners.Parameterized.Parameters;
<a name="35" href="#35">35</a>  
<a name="36" href="#36">36</a>  <em>/**<em>*</em></em>
<a name="37" href="#37">37</a>  <em> * Unit tests for the {@link ClassUtils#getActualTypeArguments(Class, Class)} method.</em>
<a name="38" href="#38">38</a>  <em> * </em>
<a name="39" href="#39">39</a>  <em> * @author aphillips</em>
<a name="40" href="#40">40</a>  <em> * @since 6 Mar 2009</em>
<a name="41" href="#41">41</a>  <em> * @see ClassUtilsTest</em>
<a name="42" href="#42">42</a>  <em> *</em>
<a name="43" href="#43">43</a>  <em> */</em>
<a name="44" href="#44">44</a>  @RunWith(value = Parameterized.<strong>class</strong>)
<a name="45" href="#45">45</a>  <strong>public</strong> <strong>class</strong> <a href="../../../../com/qrmedia/commons/lang/ClassUtilsTypeArgumentsTest.html">ClassUtilsTypeArgumentsTest</a> {
<a name="46" href="#46">46</a>      <strong>private</strong> <strong>final</strong> Class&lt;?> typedSuperclass;
<a name="47" href="#47">47</a>      <strong>private</strong> <strong>final</strong> Class&lt;?> typedClass;
<a name="48" href="#48">48</a>      <strong>private</strong> <strong>final</strong> <strong>boolean</strong> validArguments;
<a name="49" href="#49">49</a>      <strong>private</strong> <strong>final</strong> List&lt;Class&lt;?>> expectedTypeArguments;
<a name="50" href="#50">50</a>      
<a name="51" href="#51">51</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedClass&lt;U, V, W> {}
<a name="52" href="#52">52</a>      
<a name="53" href="#53">53</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedSub<strong>class</strong>&lt;S, T> <strong>extends</strong> TypedClass&lt;Integer, S, T> {}
<a name="54" href="#54">54</a>      
<a name="55" href="#55">55</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedSub<strong>class</strong>2&lt;M> <strong>extends</strong> TypedSub<strong>class</strong>&lt;M, Long> {}
<a name="56" href="#56">56</a>      
<a name="57" href="#57">57</a>      <em class="comment">// use the same type parameter letter as in the parent class</em>
<a name="58" href="#58">58</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedSub<strong>class</strong>3&lt;T> <strong>extends</strong> TypedSub<strong>class</strong>&lt;T, Long> {}
<a name="59" href="#59">59</a>      
<a name="60" href="#60">60</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedSub<strong>class</strong>4 <strong>extends</strong> TypedSub<strong>class</strong>2&lt;String> {}
<a name="61" href="#61">61</a>      
<a name="62" href="#62">62</a>      <em class="comment">// a subclass whose parent *isn't* a generic type</em>
<a name="63" href="#63">63</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedSub<strong>class</strong>5 <strong>extends</strong> TypedSub<strong>class</strong>4 {}
<a name="64" href="#64">64</a>      
<a name="65" href="#65">65</a>      <em class="comment">// a subclass whose parent *is* a generic type but arguments are not declared</em>
<a name="66" href="#66">66</a>      @SuppressWarnings(<span class="string">"rawtypes"</span>)
<a name="67" href="#67">67</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedSub<strong>class</strong>6 <strong>extends</strong> TypedSub<strong>class</strong>3 {}
<a name="68" href="#68">68</a>      
<a name="69" href="#69">69</a>      <em class="comment">// now the type parameter *itself* has a type parameter</em>
<a name="70" href="#70">70</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedSub<strong>class</strong>7 <strong>extends</strong> TypedSub<strong>class</strong>2&lt;TypedSub<strong>class</strong>3&lt;?>> {}
<a name="71" href="#71">71</a>  
<a name="72" href="#72">72</a>      <strong>private</strong> <strong>static</strong> <strong>interface</strong> TypedInterface&lt;N, O> {}
<a name="73" href="#73">73</a>      
<a name="74" href="#74">74</a>      <strong>private</strong> <strong>static</strong> <strong>interface</strong> TypedSub<strong>interface</strong>&lt;P> <strong>extends</strong> TypedInterface&lt;P, Short> {}
<a name="75" href="#75">75</a>      
<a name="76" href="#76">76</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedClass2 implements TypedSubinterface&lt;Byte> {}
<a name="77" href="#77">77</a>      
<a name="78" href="#78">78</a>      <strong>private</strong> <strong>static</strong> <strong>interface</strong> TypedSub<strong>interface</strong>2 <strong>extends</strong> TypedSub<strong>interface</strong>&lt;Byte> {}
<a name="79" href="#79">79</a>      
<a name="80" href="#80">80</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedClass3 implements TypedSubinterface2 {}
<a name="81" href="#81">81</a>      
<a name="82" href="#82">82</a>      @SuppressWarnings(<span class="string">"rawtypes"</span>)
<a name="83" href="#83">83</a>      <strong>private</strong> <strong>static</strong> <strong>class</strong> TypedClass4 implements TypedSubinterface {}
<a name="84" href="#84">84</a>      
<a name="85" href="#85">85</a>      
<a name="86" href="#86">86</a>      @Parameters
<a name="87" href="#87">87</a>      <strong>public</strong> <strong>static</strong> Collection&lt;Object[]> data() {
<a name="88" href="#88">88</a>          List&lt;Object[]> data = <strong>new</strong> ArrayList&lt;Object[]>();
<a name="89" href="#89">89</a>          
<a name="90" href="#90">90</a>          <em class="comment">// invalid arguments</em>
<a name="91" href="#91">91</a>          data.add(<strong>new</strong> Object[] { <strong>new</strong> TypedClass&lt;Integer, Short, Byte>().getClass(), <strong>null</strong>, false, <strong>null</strong> });
<a name="92" href="#92">92</a>          data.add(<strong>new</strong> Object[] { <strong>null</strong>, TypedClass.<strong>class</strong>, false, <strong>null</strong> });        
<a name="93" href="#93">93</a>          
<a name="94" href="#94">94</a>          <em class="comment">// the "subclass" is not actually a subclass of the superclass</em>
<a name="95" href="#95">95</a>          data.add(<strong>new</strong> Object[] { TypedClass.<strong>class</strong>, TypedClass2.<strong>class</strong>, <strong>true</strong>, <strong>null</strong> });
<a name="96" href="#96">96</a>          
<a name="97" href="#97">97</a>          <em class="comment">// some classes for which not all type information can be determined</em>
<a name="98" href="#98">98</a>          data.add(<strong>new</strong> Object[] { <strong>new</strong> TypedClass&lt;Integer, Short, Byte>().getClass(), TypedClass.<strong>class</strong>, 
<a name="99" href="#99">99</a>                                  <strong>true</strong>, Arrays.asList(<strong>null</strong>, <strong>null</strong>, <strong>null</strong>) });
<a name="100" href="#100">100</a>         data.add(<strong>new</strong> Object[] { <strong>new</strong> TypedSub<strong>class</strong>&lt;Short, Byte>().getClass(), TypedClass.<strong>class</strong>, <strong>true</strong>,
<a name="101" href="#101">101</a>                                 Arrays.&lt;Object>asList(Integer.<strong>class</strong>, <strong>null</strong>, <strong>null</strong>) });        
<a name="102" href="#102">102</a>         data.add(<strong>new</strong> Object[] { <strong>new</strong> TypedSub<strong>class</strong>2&lt;Byte>().getClass(), TypedClass.<strong>class</strong>, <strong>true</strong>,
<a name="103" href="#103">103</a>                                 Arrays.&lt;Object>asList(Integer.<strong>class</strong>, <strong>null</strong>, Long.<strong>class</strong>) });
<a name="104" href="#104">104</a>         data.add(<strong>new</strong> Object[] { <strong>new</strong> TypedSub<strong>class</strong>3&lt;Byte>().getClass(), TypedClass.<strong>class</strong>, <strong>true</strong>,
<a name="105" href="#105">105</a>                                 Arrays.&lt;Object>asList(Integer.<strong>class</strong>, <strong>null</strong>, Long.<strong>class</strong>) });        
<a name="106" href="#106">106</a>         data.add(<strong>new</strong> Object[] { <strong>new</strong> TypedSub<strong>class</strong>2&lt;Byte>().getClass(), TypedSub<strong>class</strong>2.<strong>class</strong>, <strong>true</strong>,
<a name="107" href="#107">107</a>                                 Arrays.&lt;Class&lt;?>>asList((Class&lt;?>) <strong>null</strong>) });        
<a name="108" href="#108">108</a>         data.add(<strong>new</strong> Object[] { <strong>new</strong> TypedSub<strong>class</strong>3&lt;Byte>().getClass(), TypedSub<strong>class</strong>3.<strong>class</strong>, <strong>true</strong>,
<a name="109" href="#109">109</a>                                 Arrays.&lt;Class&lt;?>>asList((Class&lt;?>) <strong>null</strong>) }); 
<a name="110" href="#110">110</a>         data.add(<strong>new</strong> Object[] { TypedSub<strong>class</strong>6.<strong>class</strong>, TypedSub<strong>class</strong>.<strong>class</strong>, <strong>true</strong>, 
<a name="111" href="#111">111</a>                                 Arrays.&lt;Object>asList(<strong>null</strong>, Long.<strong>class</strong>) });  
<a name="112" href="#112">112</a>         data.add(<strong>new</strong> Object[] { TypedClass4.<strong>class</strong>, TypedInterface.<strong>class</strong>, <strong>true</strong>, 
<a name="113" href="#113">113</a>                                 Arrays.&lt;Object>asList(<strong>null</strong>, Short.<strong>class</strong>) });           
<a name="114" href="#114">114</a>         
<a name="115" href="#115">115</a>         <em class="comment">// classes for which all information should be retrievable</em>
<a name="116" href="#116">116</a>         data.add(<strong>new</strong> Object[] { TypedSub<strong>class</strong>4.<strong>class</strong>, TypedClass.<strong>class</strong>, <strong>true</strong>,
<a name="117" href="#117">117</a>                                 Arrays.&lt;Object>asList(Integer.<strong>class</strong>, String.<strong>class</strong>, Long.<strong>class</strong>) });        
<a name="118" href="#118">118</a>         data.add(<strong>new</strong> Object[] { TypedSub<strong>class</strong>4.<strong>class</strong>, TypedSub<strong>class</strong>.<strong>class</strong>, <strong>true</strong>,
<a name="119" href="#119">119</a>                                 Arrays.&lt;Object>asList(String.<strong>class</strong>, Long.<strong>class</strong>) });
<a name="120" href="#120">120</a>         data.add(<strong>new</strong> Object[] { TypedSub<strong>class</strong>4.<strong>class</strong>, TypedSub<strong>class</strong>2.<strong>class</strong>, <strong>true</strong>, 
<a name="121" href="#121">121</a>                                 Arrays.&lt;Object>asList(String.<strong>class</strong>) });
<a name="122" href="#122">122</a>         data.add(<strong>new</strong> Object[] { TypedSub<strong>class</strong>4.<strong>class</strong>, TypedSub<strong>class</strong>4.<strong>class</strong>, <strong>true</strong>, 
<a name="123" href="#123">123</a>                                 <strong>new</strong> ArrayList&lt;Object>() });
<a name="124" href="#124">124</a>         data.add(<strong>new</strong> Object[] { TypedSub<strong>class</strong>5.<strong>class</strong>, TypedSub<strong>class</strong>2.<strong>class</strong>, <strong>true</strong>, 
<a name="125" href="#125">125</a>                                 Arrays.&lt;Object>asList(String.<strong>class</strong>) });
<a name="126" href="#126">126</a>         data.add(<strong>new</strong> Object[] { TypedSub<strong>class</strong>7.<strong>class</strong>, TypedSub<strong>class</strong>2.<strong>class</strong>, <strong>true</strong>, 
<a name="127" href="#127">127</a>                                 Arrays.&lt;Object>asList(TypedSub<strong>class</strong>3.<strong>class</strong>) });    
<a name="128" href="#128">128</a>         
<a name="129" href="#129">129</a>         <em class="comment">// interfaces</em>
<a name="130" href="#130">130</a>         data.add(<strong>new</strong> Object[] { TypedClass2.<strong>class</strong>, TypedInterface.<strong>class</strong>, <strong>true</strong>, 
<a name="131" href="#131">131</a>                                 Arrays.&lt;Object>asList(Byte.<strong>class</strong>, Short.<strong>class</strong>) });            
<a name="132" href="#132">132</a>         data.add(<strong>new</strong> Object[] { TypedClass2.<strong>class</strong>, TypedSubinterface.<strong>class</strong>, <strong>true</strong>, 
<a name="133" href="#133">133</a>                                 Arrays.&lt;Object>asList(Byte.<strong>class</strong>) });     
<a name="134" href="#134">134</a>         data.add(<strong>new</strong> Object[] { TypedClass3.<strong>class</strong>, TypedSubinterface.<strong>class</strong>, <strong>true</strong>, 
<a name="135" href="#135">135</a>                                 Arrays.&lt;Object>asList(Byte.<strong>class</strong>) });           
<a name="136" href="#136">136</a>         
<a name="137" href="#137">137</a>         <strong>return</strong> data;
<a name="138" href="#138">138</a>     }
<a name="139" href="#139">139</a> 
<a name="140" href="#140">140</a>     <em class="comment">// called for each parameter set in the test data</em>
<a name="141" href="#141">141</a>     <strong>public</strong> <a href="../../../../com/qrmedia/commons/lang/ClassUtilsTypeArgumentsTest.html">ClassUtilsTypeArgumentsTest</a>(Class&lt;?> typedClass, Class&lt;?> typedSuperclass, 
<a name="142" href="#142">142</a>             <strong>boolean</strong> validArguments, List&lt;Class&lt;?>> expectedTypeArguments) {
<a name="143" href="#143">143</a>         <strong>this</strong>.typedClass = typedClass;
<a name="144" href="#144">144</a>         <strong>this</strong>.typedSuperclass = typedSuperclass;
<a name="145" href="#145">145</a>         <strong>this</strong>.validArguments = validArguments;
<a name="146" href="#146">146</a>         <strong>this</strong>.expectedTypeArguments = expectedTypeArguments;
<a name="147" href="#147">147</a>     }
<a name="148" href="#148">148</a>     
<a name="149" href="#149">149</a>     @SuppressWarnings({ <span class="string">"rawtypes"</span>, <span class="string">"unchecked"</span> })
<a name="150" href="#150">150</a>     @Test
<a name="151" href="#151">151</a>     <strong>public</strong> <strong>void</strong> getActualTypeArguments_invalid() {
<a name="152" href="#152">152</a>         
<a name="153" href="#153">153</a>         <strong>if</strong> (!validArguments) {
<a name="154" href="#154">154</a>             
<a name="155" href="#155">155</a>             <strong>try</strong> {
<a name="156" href="#156">156</a>                 <em class="comment">// the cast to the generic-less (Class) is required to avoid a compiler error                </em>
<a name="157" href="#157">157</a>                 ClassUtils.getActualTypeArguments(typedClass, (Class) typedSuperclass);
<a name="158" href="#158">158</a>                 fail();
<a name="159" href="#159">159</a>             } <strong>catch</strong> (IllegalArgumentException exception) {
<a name="160" href="#160">160</a>                 <em class="comment">// expected</em>
<a name="161" href="#161">161</a>             }
<a name="162" href="#162">162</a>             
<a name="163" href="#163">163</a>         }
<a name="164" href="#164">164</a>         
<a name="165" href="#165">165</a>     }   
<a name="166" href="#166">166</a>     
<a name="167" href="#167">167</a>     @SuppressWarnings({ <span class="string">"rawtypes"</span>, <span class="string">"unchecked"</span> })
<a name="168" href="#168">168</a>     @Test
<a name="169" href="#169">169</a>     <strong>public</strong> <strong>void</strong> getActualTypeArguments() {
<a name="170" href="#170">170</a>         
<a name="171" href="#171">171</a>         <strong>if</strong> (validArguments) {
<a name="172" href="#172">172</a>             <em class="comment">// the cast to the generic-less (Class) is required to avoid a compiler error </em>
<a name="173" href="#173">173</a>             assertEquals(expectedTypeArguments, 
<a name="174" href="#174">174</a>                          ClassUtils.getActualTypeArguments(typedClass, (Class) typedSuperclass));
<a name="175" href="#175">175</a>         }
<a name="176" href="#176">176</a>         
<a name="177" href="#177">177</a>     }
<a name="178" href="#178">178</a>     
<a name="179" href="#179">179</a> }
</pre>
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